Unfinished Map or Intentional?

[Legacy]

This is on the brand new map. Apparently, there is a hole in a building that has vines going into this dark room covered with obsidian walls and cielings. I'm not sure if its intentional, but once you get in there, you are stuck.

 

[Ck400]

Woah

 

[Marakh]

Ive been down there too